pvr_ioctl_vm_unmap(9)

💅 pvr_ioctl_vm_unmap(9) — the Kernel API Manual, bestie edition 🎀

okay so real talk, this whole page lives in the Kernel API Manual, and it's literally about pvr_ioctl_vm_unmap — one little ioctl, one big job.

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✨ NAME ✨

pvr_ioctl_vm_unmap — the IOCTL that unmaps a buffer from the GPU address space. that's it, that's the whole vibe. bye buffer 👋

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🌸 SYNOPSIS 🌸

int pvr_ioctl_vm_unmap (struct drm_device *drm_dev , void *raw_args ,
struct drm_file *file );

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🦋 ARGUMENTS 🦋

• drm_dev [IN] — the DRM device. main character of the whole operation, honestly.
• raw_args [IN] — the arguments passed to this IOCTL. heads up bestie: this must be of type struct drm_pvr_ioctl_vm_unmap_args. no substitutions, no imposters 🙈
• file [IN] — DRM file private data. the private lil stash, iykyk.

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💖 DESCRIPTION 💖

so this one gets called from userspace with DRM_IOCTL_PVR_VM_UNMAP. that's the whole flex — userspace says "unmap this please" via that ioctl, and here we are. slay.

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🔥 RETURN 🔥

the way this function reports back is literally giving honesty hour:

• 0 on success 🎉 (the good timeline)
• -EINVAL if drm_pvr_ioctl_vm_op_unmap_args.device_addr is not a valid device page-aligned device-virtual address 💀 (alignment matters, no cap)
• -ENOENT if there's currently no PowerVR buffer object mapped at drm_pvr_ioctl_vm_op_unmap_args.device_addr 😭 (nothing to unmap, nothing to slay)

ngl, -EINVAL and -ENOENT are two very different problems — one's "that address is sus", the other's "there's literally nothing there". know the difference 🫶

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⭐ SEE ALSO ⭐

go read these next, bestie, they all click together like a friend group:

• Kernel file ./drivers/gpu/drm/imagination/pvr_drv.c PowerVR (Series 6 and later) and IMG Graphics Driver(9)
• pvr_ioctl_create_bo(9)
• pvr_ioctl_get_bo_mmap_offset(9)
• pvr_dev_query_gpu_info_get(9)
• pvr_dev_query_runtime_info_get(9)
• pvr_dev_query_quirks_get(9)
• pvr_dev_query_enhancements_get(9)
• pvr_ioctl_dev_query(9)
• pvr_ioctl_create_context(9)
• pvr_ioctl_destroy_context(9)
• pvr_ioctl_create_free_list(9)
• pvr_ioctl_destroy_free_list(9)
• pvr_ioctl_create_hwrt_dataset(9)
• pvr_ioctl_destroy_hwrt_dataset(9)
• pvr_ioctl_create_vm_context(9)
• pvr_ioctl_destroy_vm_context(9)
• pvr_ioctl_vm_map(9)
• pvr_drm_driver_open(9)
• pvr_drm_driver_postclose(9)

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and that's the page, angel 💜 this came out of ./drivers/gpu/drm/imagination, dated October 2026, and it's filed under pvr_ioctl_vm_unmap(9) — go unmap responsibly, muah 🫶✨